/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 00:17:49,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 00:17:49,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 00:17:49,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 00:17:49,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 00:17:49,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 00:17:49,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 00:17:49,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 00:17:49,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 00:17:49,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 00:17:49,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 00:17:49,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 00:17:49,977 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 00:17:49,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 00:17:49,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 00:17:49,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 00:17:49,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 00:17:49,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 00:17:49,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 00:17:49,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 00:17:49,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 00:17:49,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 00:17:49,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 00:17:49,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 00:17:50,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 00:17:50,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 00:17:50,004 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 00:17:50,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 00:17:50,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 00:17:50,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 00:17:50,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 00:17:50,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 00:17:50,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 00:17:50,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 00:17:50,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 00:17:50,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 00:17:50,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 00:17:50,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 00:17:50,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 00:17:50,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 00:17:50,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 00:17:50,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 00:17:50,045 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 00:17:50,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 00:17:50,046 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 00:17:50,046 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 00:17:50,047 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 00:17:50,047 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 00:17:50,047 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 00:17:50,047 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 00:17:50,047 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 00:17:50,048 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 00:17:50,048 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 00:17:50,048 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 00:17:50,049 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 00:17:50,049 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 00:17:50,049 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 00:17:50,049 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 00:17:50,049 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 00:17:50,049 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 00:17:50,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 00:17:50,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 00:17:50,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 00:17:50,051 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 00:17:50,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 00:17:50,051 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 00:17:50,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 00:17:50,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:17:50,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 00:17:50,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 00:17:50,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 00:17:50,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 00:17:50,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-04-01 00:17:50,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 00:17:50,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 00:17:50,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 00:17:50,316 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 00:17:50,317 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 00:17:50,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-04-01 00:17:51,492 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 00:17:51,747 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 00:17:51,747 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-04-01 00:17:51,785 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e3c03fa/93fdc2c81bee4c50b9743fdad9072539/FLAGc9c2406df [2023-04-01 00:17:51,808 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62e3c03fa/93fdc2c81bee4c50b9743fdad9072539 [2023-04-01 00:17:51,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 00:17:51,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 00:17:51,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 00:17:51,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 00:17:51,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 00:17:51,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:51" (1/1) ... [2023-04-01 00:17:51,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aeaa2cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:51, skipping insertion in model container [2023-04-01 00:17:51,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:17:51" (1/1) ... [2023-04-01 00:17:51,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 00:17:51,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 00:17:52,234 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-01 00:17:52,238 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:17:52,262 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 00:17:52,366 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c[65471,65484] [2023-04-01 00:17:52,367 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 00:17:52,383 INFO L208 MainTranslator]: Completed translation [2023-04-01 00:17:52,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52 WrapperNode [2023-04-01 00:17:52,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 00:17:52,384 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 00:17:52,384 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 00:17:52,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 00:17:52,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 00:17:52,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 00:17:52,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 00:17:52,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 00:17:52,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (1/1) ... [2023-04-01 00:17:52,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 00:17:52,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 00:17:52,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 00:17:52,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 00:17:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 00:17:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 00:17:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 00:17:52,648 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 00:17:52,648 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 00:17:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 00:17:52,650 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 00:17:52,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 00:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 00:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 00:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 00:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 00:17:52,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 00:17:52,895 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 00:17:52,897 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 00:17:54,432 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 00:17:55,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 00:17:55,777 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 00:17:55,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:55 BoogieIcfgContainer [2023-04-01 00:17:55,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 00:17:55,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 00:17:55,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 00:17:55,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 00:17:55,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:17:51" (1/3) ... [2023-04-01 00:17:55,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f927da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:55, skipping insertion in model container [2023-04-01 00:17:55,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:17:52" (2/3) ... [2023-04-01 00:17:55,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f927da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:17:55, skipping insertion in model container [2023-04-01 00:17:55,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:17:55" (3/3) ... [2023-04-01 00:17:55,790 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c [2023-04-01 00:17:55,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 00:17:55,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 00:17:55,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 00:17:55,883 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ab2dbc1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 00:17:55,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 00:17:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 00:17:55,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-04-01 00:17:55,921 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:17:55,922 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:17:55,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:17:55,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:17:55,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1201355822, now seen corresponding path program 1 times [2023-04-01 00:17:55,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:17:55,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524076771] [2023-04-01 00:17:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:17:55,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:17:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:18:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:18:08,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:18:08,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524076771] [2023-04-01 00:18:08,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524076771] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:18:08,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:18:08,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2023-04-01 00:18:08,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116037679] [2023-04-01 00:18:08,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:18:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 00:18:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:18:08,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 00:18:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-04-01 00:18:08,103 INFO L87 Difference]: Start difference. First operand has 479 states, 455 states have (on average 1.6923076923076923) internal successors, (770), 456 states have internal predecessors, (770), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 00:18:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:18:13,640 INFO L93 Difference]: Finished difference Result 594 states and 941 transitions. [2023-04-01 00:18:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-04-01 00:18:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 160 [2023-04-01 00:18:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:18:13,657 INFO L225 Difference]: With dead ends: 594 [2023-04-01 00:18:13,658 INFO L226 Difference]: Without dead ends: 536 [2023-04-01 00:18:13,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=1368, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 00:18:13,664 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 6477 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7271 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 7470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 00:18:13,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6480 Valid, 206 Invalid, 7470 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [199 Valid, 7271 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 00:18:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2023-04-01 00:18:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 510. [2023-04-01 00:18:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.680672268907563) internal successors, (800), 477 states have internal predecessors, (800), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2023-04-01 00:18:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 834 transitions. [2023-04-01 00:18:13,762 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 834 transitions. Word has length 160 [2023-04-01 00:18:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:18:13,763 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 834 transitions. [2023-04-01 00:18:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 11 states have (on average 12.727272727272727) internal successors, (140), 13 states have internal predecessors, (140), 9 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 00:18:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 834 transitions. [2023-04-01 00:18:13,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 00:18:13,766 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:18:13,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:18:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 00:18:13,767 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:18:13,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:18:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash -57214818, now seen corresponding path program 1 times [2023-04-01 00:18:13,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:18:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395249981] [2023-04-01 00:18:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:18:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:18:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:18:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:18:19,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:18:19,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395249981] [2023-04-01 00:18:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395249981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:18:19,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:18:19,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:18:19,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207472205] [2023-04-01 00:18:19,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:18:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:18:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:18:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:18:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:18:19,321 INFO L87 Difference]: Start difference. First operand 510 states and 834 transitions. Second operand has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:18:22,394 INFO L93 Difference]: Finished difference Result 593 states and 939 transitions. [2023-04-01 00:18:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:18:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 161 [2023-04-01 00:18:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:18:22,399 INFO L225 Difference]: With dead ends: 593 [2023-04-01 00:18:22,400 INFO L226 Difference]: Without dead ends: 543 [2023-04-01 00:18:22,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:18:22,402 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 849 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 6313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 00:18:22,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 118 Invalid, 6335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 6313 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 00:18:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2023-04-01 00:18:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 510. [2023-04-01 00:18:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6785714285714286) internal successors, (799), 477 states have internal predecessors, (799), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 00:18:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 832 transitions. [2023-04-01 00:18:22,468 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 832 transitions. Word has length 161 [2023-04-01 00:18:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:18:22,470 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 832 transitions. [2023-04-01 00:18:22,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.142857142857142) internal successors, (141), 9 states have internal predecessors, (141), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 832 transitions. [2023-04-01 00:18:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-04-01 00:18:22,475 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:18:22,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:18:22,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 00:18:22,475 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:18:22,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:18:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash -2136837957, now seen corresponding path program 1 times [2023-04-01 00:18:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:18:22,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602642269] [2023-04-01 00:18:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:18:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:18:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:18:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:18:27,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:18:27,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602642269] [2023-04-01 00:18:27,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602642269] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:18:27,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:18:27,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:18:27,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191928385] [2023-04-01 00:18:27,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:18:27,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:18:27,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:18:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:18:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:18:27,375 INFO L87 Difference]: Start difference. First operand 510 states and 832 transitions. Second operand has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:18:29,917 INFO L93 Difference]: Finished difference Result 587 states and 923 transitions. [2023-04-01 00:18:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:18:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 162 [2023-04-01 00:18:29,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:18:29,923 INFO L225 Difference]: With dead ends: 587 [2023-04-01 00:18:29,924 INFO L226 Difference]: Without dead ends: 542 [2023-04-01 00:18:29,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:18:29,926 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 854 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 5542 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 859 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 5575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:18:29,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [859 Valid, 111 Invalid, 5575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5542 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 00:18:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2023-04-01 00:18:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 510. [2023-04-01 00:18:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6764705882352942) internal successors, (798), 477 states have internal predecessors, (798), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 00:18:29,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 831 transitions. [2023-04-01 00:18:29,975 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 831 transitions. Word has length 162 [2023-04-01 00:18:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:18:29,976 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 831 transitions. [2023-04-01 00:18:29,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.285714285714285) internal successors, (142), 9 states have internal predecessors, (142), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:29,977 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 831 transitions. [2023-04-01 00:18:29,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-04-01 00:18:29,979 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:18:29,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:18:29,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 00:18:29,979 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:18:29,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:18:29,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1073934425, now seen corresponding path program 1 times [2023-04-01 00:18:29,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:18:29,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28468547] [2023-04-01 00:18:29,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:18:29,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:18:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 00:18:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 00:18:34,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 00:18:34,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28468547] [2023-04-01 00:18:34,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28468547] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 00:18:34,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 00:18:34,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 00:18:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949208202] [2023-04-01 00:18:34,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 00:18:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 00:18:34,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 00:18:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 00:18:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-04-01 00:18:34,539 INFO L87 Difference]: Start difference. First operand 510 states and 831 transitions. Second operand has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 00:18:37,072 INFO L93 Difference]: Finished difference Result 595 states and 930 transitions. [2023-04-01 00:18:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 00:18:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 163 [2023-04-01 00:18:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 00:18:37,076 INFO L225 Difference]: With dead ends: 595 [2023-04-01 00:18:37,076 INFO L226 Difference]: Without dead ends: 550 [2023-04-01 00:18:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-04-01 00:18:37,078 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1621 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 5524 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 00:18:37,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 105 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5524 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 00:18:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-04-01 00:18:37,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 510. [2023-04-01 00:18:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 476 states have (on average 1.6743697478991597) internal successors, (797), 477 states have internal predecessors, (797), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 00:18:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 830 transitions. [2023-04-01 00:18:37,129 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 830 transitions. Word has length 163 [2023-04-01 00:18:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 00:18:37,129 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 830 transitions. [2023-04-01 00:18:37,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 20.428571428571427) internal successors, (143), 9 states have internal predecessors, (143), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-01 00:18:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 830 transitions. [2023-04-01 00:18:37,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-04-01 00:18:37,139 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 00:18:37,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 00:18:37,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 00:18:37,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 00:18:37,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 00:18:37,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1376951900, now seen corresponding path program 1 times [2023-04-01 00:18:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 00:18:37,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221543001] [2023-04-01 00:18:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 00:18:37,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 00:18:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat